Review on High-Quality ShineNow Replacement Soldering Tips for Weller WESD51 WES51 WE1010NA PES50 PES51 ET - Conical ETS Tip 5pcs Pack by Rod Evans

Weller tips are rounded on the corners of the screwdriver like tip. They are sharp and can cut PCB marks if the user is not careful. Additionally, the rounded surface of the tip means more of the tip comes in contact with the heated parts than if the corners were square. The wall of the cylindrical part that goes into the tip is not as thick as the original Weller tip. The outside diameter is correct, but since the cylinder is thinner, they may not be able to conduct heat as well. And between the wall of the cylindrical section of the tip and the temperature sensor in the middle, the air gap is bigger. However, they seem to work. For the do-it-yourselfer, the price matches what you get.